Hangzhou Guoda Landison Hotel
The object of technology improvement is the central air-conditioning circulating water system. The air-conditioning room is located on the underground second floor and equipped with one 350RT centrifugal chiller, three 375RT screw chillers and one 400RT screw chiller. Four chillers are operated under the maximum load. After system optimization and adjustment, ten high-efficiency pumps are used. According to the acceptance results, 683,000KWH power can be saved annually.
| Operating Mode | Power Consumption before Technology Improvement (kW) | Power Consumption after Technology Improvement (kW) | Power Saving Rate |
| Refrigerant pump | Cooling pump | Refrigerant pump | Cooling pump |
| Operation of 1# chiller | 3×28.1 | 1×53.1 | 2×16.7 | 1×21.2 | 60.3% |
| Operation of 2# chiller | 3×28.1 | 2×53.1 | 2×16.7 | 2×21.2 | 60.2% |
| Operation of 3# chiller | 4×28.1 | 3×53.1 | 3×16.7 | 3×21.2 | 56.2% |
| Operation of 4# chiller | 5×28.1 | 4×53.1 | 4×16.7 | 4×21.2 | 57.1% |
| Heating operation | 3×28.1 | / | 2×16.7 | / | 60.3% |
| 4×28.1 | / | 2×16.7 | / | 70.0% |